A Photocathode Has a Work Function of 2

question 39

Multiple Choice

A photocathode has a work function of 2.8 eV.The photocathode is illuminated with monochromatic radiation whose photon energy is 4.0 eV.The threshold frequency for photoelectron production is closest to:

• A)6.8 × 10¹⁴ Hz
• B)2.9 × 10¹⁴ Hz
• C)7.7 × 10¹⁴ Hz
• D)8.6 × 10¹⁴ Hz
• E)9.7 × 10¹⁴ Hz

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Definitions:

Permanent Differences

Differences between taxable income and accounting income that arise due to items recognized in one manner for accounting purposes and in another manner for tax purposes, and they do not reverse over time.

Permanent Differences

Differences between taxable income and accounting income that originate in one period and do not reverse over time, affecting the effective tax rate.

Temporary Differences

Temporary differences are differences between the carrying amount of an asset or liability in the balance sheet and its tax base, leading to deferred tax assets or liabilities.

Taxable Income

Taxable income is the amount of income used to calculate how much tax an individual or a company owes to the government in a given tax year.